Send traffic-management headers from extension updater.

extensions/browser/updater/manifest_fetch_data.h

Index: extensions/browser/updater/manifest_fetch_data.h
diff --git a/extensions/browser/updater/manifest_fetch_data.h b/extensions/browser/updater/manifest_fetch_data.h
index 0a31846d4eccdc4fa0b3488e7d2085a0247ebdd6..bafd6ca48782f09a68c235d4cf7d8332718bd9d4 100644
--- a/extensions/browser/updater/manifest_fetch_data.h
+++ b/extensions/browser/updater/manifest_fetch_data.h
@@ -74,22 +74,26 @@ class ManifestFetchData {
                     int request_id,
                     const std::string& brand_code,
                     const std::string& base_query_params,
-                    PingMode ping_mode);
+                    PingMode ping_mode,
+                    bool foreground_check);

[Devlin, 2017/03/24 15:14:47]

I'd slightly prefer we use an enum for this, e.g.
enum class FetchPriority {
  FOREGROUND,
  BACKGROUND,
}

and then pass that rather than the anonymous true/false everywhere.  WDYT?

[Minh X. Nguyen, 2017/03/27 23:05:29]

Done.

   ~ManifestFetchData();
 
   // Returns true if this extension information was successfully added. If the
-  // return value is false it means the full_url would have become too long, and
+  // return value is false it means the full_url would have become too long or
+  // the request type is not compatible the current request type, and
   // this ManifestFetchData object remains unchanged.
   bool AddExtension(const std::string& id,
                     const std::string& version,
                     const PingData* ping_data,
                     const std::string& update_url_data,
-                    const std::string& install_source);
+                    const std::string& install_source,
+                    bool foreground_check);
 
   const GURL& base_url() const { return base_url_; }
   const GURL& full_url() const { return full_url_; }
   const std::set<std::string>& extension_ids() const { return extension_ids_; }
   const std::set<int>& request_ids() const { return request_ids_; }
+  bool foreground_check() const { return foreground_check_; }
 
   // Returns true if the given id is included in this manifest fetch.
   bool Includes(const std::string& extension_id) const;
@@ -132,6 +136,9 @@ class ManifestFetchData {
   // (and possibly extra metrics) will be included in the fetch query.
   const PingMode ping_mode_;
 
+  // If true, this is an on-demand update.
+  bool foreground_check_;
+
   DISALLOW_COPY_AND_ASSIGN(ManifestFetchData);
 };